On the saturation in the average transmitted current in two-dimensional planar diodes

Kumar, Raghwendra; Biswas, Debabrata
September 2009
Physics of Plasmas;Sep2009, Vol. 16 Issue 9, p093114
Academic Journal
The relation between average transmitted current density (JTR) and injected current density (JIN) in a two-dimensional planar diode is investigated using particle-in-cell simulation. Beyond the space charge limited value of injected current density, JTR is found to increase slowly with JIN and finally saturate for higher values. The physics of gradual increase in JTR to the saturation value is explained using the electric field profile at the cathode surface.


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